1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![allow(non_camel_case_types)]
13 pub use self::FileMatch::*;
15 use rustc_data_structures::fx::FxHashSet;
19 use std::path::{Path, PathBuf};
21 use session::search_paths::{SearchPaths, PathKind};
22 use rustc_fs_util::fix_windows_verbatim_for_gcc;
24 #[derive(Copy, Clone)]
30 // A module for searching for libraries
32 pub struct FileSearch<'a> {
33 pub sysroot: &'a Path,
34 pub search_paths: &'a SearchPaths,
39 impl<'a> FileSearch<'a> {
40 pub fn for_each_lib_search_path<F>(&self, mut f: F) where
41 F: FnMut(&Path, PathKind)
43 let mut visited_dirs = FxHashSet::default();
44 visited_dirs.reserve(self.search_paths.paths.len() + 1);
45 for (path, kind) in self.search_paths.iter(self.kind) {
47 visited_dirs.insert(path.to_path_buf());
50 debug!("filesearch: searching lib path");
51 let tlib_path = make_target_lib_path(self.sysroot,
53 if !visited_dirs.contains(&tlib_path) {
54 f(&tlib_path, PathKind::All);
57 visited_dirs.insert(tlib_path);
60 pub fn get_lib_path(&self) -> PathBuf {
61 make_target_lib_path(self.sysroot, self.triple)
64 pub fn search<F>(&self, mut pick: F)
65 where F: FnMut(&Path, PathKind) -> FileMatch
67 self.for_each_lib_search_path(|lib_search_path, kind| {
68 debug!("searching {}", lib_search_path.display());
69 let files = match fs::read_dir(lib_search_path) {
73 let files = files.filter_map(|p| p.ok().map(|s| s.path()))
75 fn is_rlib(p: &Path) -> bool {
76 p.extension() == Some("rlib".as_ref())
78 // Reading metadata out of rlibs is faster, and if we find both
79 // an rlib and a dylib we only read one of the files of
80 // metadata, so in the name of speed, bring all rlib files to
81 // the front of the search list.
82 let files1 = files.iter().filter(|p| is_rlib(p));
83 let files2 = files.iter().filter(|p| !is_rlib(p));
84 for path in files1.chain(files2) {
85 debug!("testing {}", path.display());
86 let maybe_picked = pick(path, kind);
89 debug!("picked {}", path.display());
92 debug!("rejected {}", path.display());
99 pub fn new(sysroot: &'a Path,
101 search_paths: &'a SearchPaths,
102 kind: PathKind) -> FileSearch<'a> {
103 debug!("using sysroot = {}, triple = {}", sysroot.display(), triple);
112 // Returns a list of directories where target-specific dylibs might be located.
113 pub fn get_dylib_search_paths(&self) -> Vec<PathBuf> {
114 let mut paths = Vec::new();
115 self.for_each_lib_search_path(|lib_search_path, _| {
116 paths.push(lib_search_path.to_path_buf());
121 // Returns a list of directories where target-specific tool binaries are located.
122 pub fn get_tools_search_paths(&self) -> Vec<PathBuf> {
123 let mut p = PathBuf::from(self.sysroot);
124 p.push(find_libdir(self.sysroot).as_ref());
125 p.push(RUST_LIB_DIR);
126 p.push(&self.triple);
132 pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
133 let mut p = PathBuf::from(find_libdir(sysroot).as_ref());
134 assert!(p.is_relative());
135 p.push(RUST_LIB_DIR);
136 p.push(target_triple);
141 fn make_target_lib_path(sysroot: &Path,
142 target_triple: &str) -> PathBuf {
143 sysroot.join(&relative_target_lib_path(sysroot, target_triple))
146 pub fn get_or_default_sysroot() -> PathBuf {
147 // Follow symlinks. If the resolved path is relative, make it absolute.
148 fn canonicalize(path: Option<PathBuf>) -> Option<PathBuf> {
149 path.and_then(|path| {
150 match fs::canonicalize(&path) {
151 // See comments on this target function, but the gist is that
152 // gcc chokes on verbatim paths which fs::canonicalize generates
153 // so we try to avoid those kinds of paths.
154 Ok(canon) => Some(fix_windows_verbatim_for_gcc(&canon)),
155 Err(e) => bug!("failed to get realpath: {}", e),
160 match env::current_exe() {
162 match canonicalize(Some(exe)) {
163 Some(mut p) => { p.pop(); p.pop(); p },
164 None => bug!("can't determine value for sysroot")
167 Err(ref e) => panic!(format!("failed to get current_exe: {}", e))
171 // The name of the directory rustc expects libraries to be located.
172 fn find_libdir(sysroot: &Path) -> Cow<'static, str> {
173 // FIXME: This is a quick hack to make the rustc binary able to locate
174 // Rust libraries in Linux environments where libraries might be installed
175 // to lib64/lib32. This would be more foolproof by basing the sysroot off
176 // of the directory where librustc is located, rather than where the rustc
178 // If --libdir is set during configuration to the value other than
179 // "lib" (i.e., non-default), this value is used (see issue #16552).
181 #[cfg(target_pointer_width = "64")]
182 const PRIMARY_LIB_DIR: &str = "lib64";
184 #[cfg(target_pointer_width = "32")]
185 const PRIMARY_LIB_DIR: &str = "lib32";
187 const SECONDARY_LIB_DIR: &str = "lib";
189 match option_env!("CFG_LIBDIR_RELATIVE") {
190 Some(libdir) if libdir != "lib" => libdir.into(),
191 _ => if sysroot.join(PRIMARY_LIB_DIR).join(RUST_LIB_DIR).exists() {
192 PRIMARY_LIB_DIR.into()
194 SECONDARY_LIB_DIR.into()
199 // The name of rustc's own place to organize libraries.
200 // Used to be "rustc", now the default is "rustlib"
201 const RUST_LIB_DIR: &str = "rustlib";